Steam-hammer.



' 1 Tb, altwhenz it may y UNITED STATES PATENT oEEicE iWTLLIAM J. RAGMAN, or vrnIn.{DELPHIA, PENNsYLvANiA, Assrenon To ninas-A BE'MENT-POND GOMBANY, QF PHILADELPHIA, PENNSYLVANIA. u

STEAMHAM'MER.

aia-36s,

lSpecification'if/Letterslatent. i Patented Oct. 11, 1910.

Application filed -April 6, 1910. Serial No.' 553,762.

B iftlmownthat I, WILLAM J. HAGMAN,

a 'citizen lof the United States, residing. at Philadelphia, Philadelphia. ;county, Penn- Sylvania, have invented certainnew and .use- 'fnlflmprovements in Steam-Hammers, of WhleliLthe following is a speeification.

.'.lfhasi'lnvention relates to"l an' improved valve system for steam hammers and'lth'e lnventron. Will'be readily understood from 'the' *following description taken in connection with the accompanying drawing which is a verticallongitndinal section 'of' the cylinder and steanrchest .cita steam'. hammer exemplifymg my present invention. i

In the drawing :-1, indicates the'steam cylinder; 2, the piston thereof: 3, the hammer-rodand piston-rod: 4, the steam chest:

5, the'st'eam inlet pip'e'to the steam chest' 6,- the exhaustpipe from the steam-chest: l7, asteampassage leading from the steamchest to theupper endof the cylinder: 8, a passage leading from Athe steam-chest to the lower end of the cylinder 1 9, the main valve adapted to place the upper end of the .cylinder m communication With the steam inlet and at the same time place'the lower end of the cylinder in communication With the exhaust out-let, or, on thel other hand, place `the lower end of the cylinder in communication `With the steam inlet 'and atthe same time place the upper end of. the cylinder in communication With theI lexhaust outlet: 10, the usual link mechanism for reciprocating the valve and serving to. typifyv Well known. operating means connected With the main valve: 11, a `steam throttle '-valve disposed in the conduit between the steam inlet and the steam chest v12, a lever by means of which the steamthrottle valve may loe va'ctuated: 1.3, an exhaust throttle-valve disposed in the conduitl between the'steam-chest and the exhaust outlet: 14, an armfor actuating the exhaust throttle valve-Q15, a link attached tdthisl arm and serving asmeans byvvhich the armmay be raised and the valve opened:

and 16, a stop to limit the descent ofthe .arm to a position `corresponding With closed position of the exhaust throttle'valve. A I

Disregarding forthepresent the presence of the exhaust 'throttle-valve, the hammer Would he" operated precisely as usual With ordinarysteam hammers and, as usual, When the present Work of the hammer'lwas over,-

sweetie... f the. .actuatn l the steam throttle valve Would be closed.

After a more o'r less extended time the hammer would again -need to vloe ,used and it Would be found that` the 'cylinder and 'its accessoriesihad cooled off to such an extent as to interfere With ythe prompt, delicate andv accurate Working of the hammer.' v Follow' ing the usual custom, the steam throttlevalve would be opened more or less and4 steam would be allowedto lolow.v through the' steam-chest Iandcylinder and -out of the. ex-` haust until.. things avere properly Wlarmed up. This '.Will :manifestly have resulted. iin some. loss of time and in some lossef steam.

But, in my present system, the exhaust throttle-valve, closes automat'cally by the Weight of link 15 Whenever the operator ceases to hold that link in elevatedI positioncorrespending with the open position'oftlieuexfhaust. throttle-valve, a positionto which' he holds the exhaust throttle valve While the hammer is Working. The result is that when the present lwork of the .hammer is over it may be" left under full 'steam pressurefto keep its parts hot, and the only loss Will be Such as is due to condensation.

When .the hammer is to be used again then the exhaustthrottle-valve is'to be opened by the oper,- ator and .the use of the hammer maybe in; stantly proceeded With'in the usual manner under the best conditions,` the exhaust throttle-valve again automatically closing when I the operator ceases to hold it open;

It is to be observed that with the exhaust throttlervalve closed, Which is its normal condition when the hammer is idle, the steam may be admitted freely to the steam chest and to both ends of the cylinder, which latter result may be accomplished by actuating the main' valve. But. the main valves of steam hammers` are notoriousv for leaking,

owing to the peculiar conditions of, Working and it'vvill therefore generally be' suiicient to vopen the steam throttle-valve andl permit the steam to' have free f ioW' to the steamchest, thesteam finding-its vvay to both ends of the cylinder, even ifthe mainA valve vbe on lap as to both' ends ofthe cylinder,1 ,with

suflicient freedom to keep all the' partss'utlL ciently Warm 'forf instant response to duty .when the hammer? isgequired for use,` he understood that l.link

and, second, for its automatic closure except when held open by the operator.

l. A steam hammer comprising, a steam cylinder provided with passages leading to its opposite ends, a steam-chestconnecting withthe steam inlet while the other one of' the cylinder passages is placed in communicatlion with thefexhaust outlet, a throttleva ve in the steam inlet, a throttle-valve disposed in the passage between the steam-chest and the exhaust outlet, and independent means for controlling said throttle valves,

whereby while the hammer is idle steam may be freely admitted to both ends .of the cylin-A der wit-hout escaping from the exhaust outlet, combined substantially as set foith.

2. A steam'hammer comprising, a steam l cylinder, a steam chest provided with a steam inlet and an. exhaust outlet and with passages leading to' the opposite ends of the cylinder7 a main valve disposed in the steam chest and adapted to place either one of the cylinder passages in communication with the steam'inlet while the other one of the cylinder passages is placed in communication with the exhaust outlet, a throttle-valve in the steam inlet, a throttle-valve disposed in the passage between ythe steam-chest-and the"I exhaust outlet, independent means for controlling said throttle valves, and means fory automatically closing lthe exhaust lthrottle- Valve, whereby while the hammer is yidle vsteam may hetreely admitted tofboth ends of the cylinder without escaping from 'the ex haust outlet, combined substantially as setforth.

WILLIAM J; HAGMAN.

Witnesses WILLARD T. SEARS,

R. RAYMOND PORTER.' 

